vendor: Mega update all dependencies

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4080

vendor/github.com/cznic/fileutil/fileutil_freebsd.go

@@ -11,6 +11,8 @@ import (
 	"os"
 )
 
+const hasPunchHole = false
+
 // PunchHole deallocates space inside a file in the byte range starting at
 // offset and continuing for len bytes. Unimplemented on FreeBSD.
 func PunchHole(f *os.File, off, len int64) error {